CN201926024U - Pressure-bearing bi-water tank circulating solar hot water control system - Google Patents

Abstract

The utility model relates to a pressure-bearing double water tank circulation solar hot water control system, which comprises a heat collection control system, a plurality of household heat exchange control systems connected with it and a system terminal control device. The heat collection control system includes a circulation heat collection main circuit and a heat collection branch circuit. The circulation heat collection main circuit includes a solar collector group connected in sequence through a circulation main pipe, a first solenoid valve, a buffer medium water tank, a circulating water pump and a second solenoid valve , the heat collection branch includes the roof hot water storage tank and the third solenoid valve and the fourth solenoid valve connecting the roof hot water storage tank and the circulation supervisor. There are several temperature sensors in the system. It is electrically connected with the system terminal control device. The utility model can transfer and store surplus solar heat to the roof hot water storage tank, which can not only meet the heat supply of users under the condition of insufficient sunshine, but also maximize the collection and storage of solar radiation.

Description

A pressurized double water tank circulation solar hot water control system

technical field

The utility model relates to a solar hot water control system, in particular to a pressure-bearing double water tank circulating solar hot water control system with uniform heat distribution, enhanced heat storage capacity and improved utilization rate of solar heat.

Background technique

For the centralized heat collection and household heat storage solar water heating system widely used in multi-storey and high-rise residential buildings, its form is characterized by the sharing of collector groups, separate household water tanks for each household, and forced circulation ways to collect and store solar energy. According to the circulation type of the existing system and its control system, it can generally be divided into two types: one is to install an intermediate water tank with a large capacity in the public circulation pipeline, and realize heat collection and heat exchange through the separate operation of two sets of water pumps The other is not to set up a public water tank, and use pipeline circulation to directly transfer the heat collected by the collector to the household water tank.

Although the above two cycle types and their control systems are relatively simple and can also realize the heat transfer process, they have the following shortcomings: due to the difference in solar radiation throughout the year and the periodic use of hot water by users, some There will be excess heat during the time period, and the above two solar water heating systems cannot further store the excess solar heat, resulting in the inability to fully utilize the solar heat. When the sunlight is sufficient or the user does not use much heat, it will cause waste of solar heat; when the light is insufficient or the user uses too much heat, the stored heat cannot meet the needs of the user, thereby increasing the consumption of auxiliary heat sources.

Contents of the invention

The utility model mainly solves the problem that the original solar water heating system cannot further store excess solar heat when the sunlight is sufficient or the user does not use much heat, resulting in waste of solar heat and low utilization rate of solar energy. On the other hand, it also increases the auxiliary heat source Consumption of the technical problems; provide a pressurized double water tank cycle solar hot water control system, to achieve the maximum collection, conversion and storage of solar radiation under different weather conditions, improve the utilization rate of solar energy, Reduce the consumption of auxiliary heat source, and the system runs more stably, and can realize the balanced distribution of heat.

The above-mentioned technical problems of the utility model are mainly solved by the following technical solutions: the utility model includes a heat collection control system, a plurality of individual household heat exchange control systems connected with the heat collection control system, and control heat collection control systems and distributed The system terminal control device for the operation of the household heat exchange control system. The heat collection control system includes a circulation heat collection main loop and a heat collection branch. The circulation heat collection main loop includes solar collectors connected in sequence through a circulation main pipe Group, first electromagnetic valve, buffer medium water tank, circulating water pump and second electromagnetic valve, the heat collection branch includes roof hot water storage tank and third electromagnetic valve, fourth electromagnetic valve, connected between the first electromagnetic valve and The circulation main pipe between the solar collector groups communicates with the inlet of the roof heat storage tank through the third electromagnetic valve, and the outlet of the roof heat storage tank communicates with the circulation main pipe connected between the buffer medium water tank and the circulating water pump. The inlet of the roof hot water storage tank is also communicated with the circulation main pipe connected between the second solenoid valve and the solar heat collector group through the fourth solenoid valve. The temperature sensor, the temperature sensor, the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the circulating water pump are all electrically connected to the system terminal control device. The solar collector group collects the solar radiation, and the system terminal control device collects the real-time temperature of each point through the temperature sensor. The terminal control device of the system is a combination of hardware and software, which can issue various instructions to control the solenoid valve and circulating water pump through internal program processing. The whole system has a high degree of intelligence, more stable operation, and a balanced distribution of solar heat. The buffer medium water tank adopts a small-capacity water tank, and the roof heat storage tank adopts a large-capacity water tank. Among them, the function of the buffer medium water tank is to accumulate and buffer the circulation of the medium water in the pipeline, effectively separate the gas and liquid, and ensure that the circulating water pump does not run without gas or idle during operation. The function of the large-capacity roof hot water storage tank is that when the weather is good and the solar radiation is sufficient, according to the hot water usage of the user, the heat of the household water tank may be stored to full capacity, in order to be able to collect and store excess The heat of the system is controlled by the system terminal control device on the opening and closing states of each solenoid valve to control the mode conversion operation, heat the medium water in the roof hot water storage tank, and transfer the excess solar heat to the large-capacity roof hot water storage tank middle. When the users have used up the effective heat in their respective household water tanks and the solar energy is insufficient, the heat stored in the roof hot water storage tanks can be used as a heat source for timely heat exchange with the household water tanks, especially to meet the needs of users at night and in the rain The heat supply under weather conditions not only effectively stores the surplus solar energy, but also ensures the use of hot water for users when the solar radiation is insufficient. Therefore, the utility model maximizes the collection, transformation and storage of solar radiation, improves the utilization rate of solar energy, reduces the consumption of auxiliary heat sources, and is more energy-saving.

As a preference, the household heat exchange control system includes household water tanks, circulation branch pipes and household solenoid valves, and the household solenoid valves are arranged on the circulation branch pipes connected to the inlets of the heat exchange pipes in the household water tanks , this circulation branch pipe is connected to the circulation main pipe between the second solenoid valve and the circulating water pump in the heat collecting main loop through the descending circulation main pipe, and the circulation branch pipe connected to the outlet of the heat exchange tube in the household water tank passes through the downward circulation The main pipe is connected to the circulation main pipe between the second solenoid valve and the solar collector group in the heat collecting circuit, and several temperature sensors are arranged in the household heat exchange control system, and the temperature in the household heat exchange control system The sensors and household solenoid valves are all electrically connected to the system terminal control device. The system terminal control device collects the temperature in the household water tank and controls the household solenoid valve. The household water tanks exchange heat through the down-circulation main pipe, the buffer medium water tank, and the roof hot water storage tank.

As a preference, a temperature sensor is provided on the solar thermal collector group, a temperature sensor is provided in the roof hot water storage tank, and a circulating main pipe connected to the fourth solenoid valve is connected to the solar thermal collector group. There is a temperature sensor.

As a preference, a temperature sensor is provided in the household water tank, and a temperature sensor is provided on the down-circulation main pipe connected to the household solenoid valve.

As a preference, a flow meter and a fifth solenoid valve are provided on the circulation branch connected to the household solenoid valve of the bottom user, and the flow meter and the fifth solenoid valve are both electrically connected to the system terminal control device. When the medium water in the buffer medium water tank and the circulation main pipe reaches a certain temperature, and the temperature of the circulation main pipe and the temperature of the household water tank of the bottom user reaches a certain temperature difference, the system terminal control device instructs the household solenoid valve of the household to open, and monitors it through the flow meter When there is flow through the circulation branch pipe section of the household, the fifth solenoid valve on the bottom user circulation branch pipe is closed at this time, and the whole system enters the reserve heat exchange process, and the medium water in the roof hot water storage tank is circulated into the heat exchange condition. Heat exchange is carried out in the heat exchange coil of the household water tank.

The beneficial effects of the utility model are: 1. By setting up double water tanks, that is, the buffer medium water tank and the roof hot water storage tank, on the one hand, the stability of the cycle operation of the solar water heating system can be ensured, and the balanced distribution of heat can be realized; When the solar radiation is sufficient and the heat storage of the household water tank reaches full capacity, the excess solar heat can be transferred and stored in the roof hot water storage tank, which can not only meet the heat supply of users at night and in rainy weather, It can also maximize the collection, conversion and storage of solar radiation, improve the utilization rate of solar energy, and reduce the consumption of auxiliary heat sources. 2. Monitor the flow state in the bottom user circulation branch pipe through the flow meter, so as to control the conversion of the system's heat collection and heat transfer state, so as to ensure that the solar heat can be evenly distributed to the heat demand users on different floors, and avoid heat exchange between high and low floors The emergence of imbalances.

Description of drawings

Fig. 1 is a schematic diagram of a system connection structure of the present invention.

Fig. 2 is a timing block diagram of a control flow of the utility model.

In the figure 1. System terminal control device, 2. Circulation supervisor, 3. Solar collector group, 4. First solenoid valve, 5. Buffer medium water tank, 6. Circulating water pump, 7. Second solenoid valve, 8. Roof Hot water storage tank, 9. Third solenoid valve, 10. Fourth solenoid valve, 11. Temperature sensor, 12. Household water tank, 13. Circulation branch pipe, 14. Household solenoid valve, 15. Downward circulation supervisor, 16. Flow meter, 17. Fifth solenoid valve.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment 1: A pressurized double water tank circulation solar hot water control system of this embodiment, as shown in Figure 1, includes a heat collection control system and multiple household heat exchange control systems connected to the heat collection control system And a system terminal control device 1 for controlling the operation of the heat collection control system and the household heat exchange control system. The heat collection control system includes a circulation heat collection main loop and a heat collection branch. The circulation heat collection main loop includes a solar heat collector group 3 connected in sequence through a circulation main pipe 2, a first solenoid valve 4, a buffer medium water tank 5, and a circulating water pump 6 and the second solenoid valve 7. The heat collection branch includes a roof hot water storage tank 8 , a third solenoid valve 9 , and a fourth solenoid valve 10 . The circulation main pipe 2 connected between the first electromagnetic valve 4 and the solar collector group 3 communicates with the inlet of the roof hot water storage tank 8 through the third electromagnetic valve 9, and the outlet of the roof hot water storage tank 8 is connected to the buffer medium The circulation main pipe 2 between the water tank 5 and the circulating water pump 6 communicates, and the inlet of the roof hot water storage tank 8 also passes through the fourth solenoid valve 10 and the circulation main pipe 2 connected between the second solenoid valve 7 and the solar collector group 3 connected. A temperature sensor 11 is installed on the solar collector group 3 , a temperature sensor 11 is installed in the roof hot water storage tank 8 , and a temperature sensor 11 is installed on the circulation main pipe 2 where the fourth electromagnetic valve 10 is connected to the solar collector group 3 .

The household heat exchange control system includes household water tanks 12 , circulation branch pipes 13 and household solenoid valves 14 . Household solenoid valve 14 is installed on the circulation branch pipe 13 connected to the inlet of the heat exchange pipe in the household water tank 12, and this circulation branch pipe is connected to the second solenoid valve 7 and the On the circulation main pipe 2 between the circulating water pumps 6, the circulation branch pipe 13 connected to the outlet of the heat exchange pipe in the household water tank 12 is connected to the second solenoid valve 7 and the solar heat collector in the circulation heat collection circuit through the down circulation main pipe 15 Loop between groups 3 on main 2. A flowmeter 16 and a fifth electromagnetic valve 17 are installed on the circulating branch pipe 13 connected to the household solenoid valve 14 of the bottommost user. Both the flow meter 16 and the fifth solenoid valve 17 are electrically connected to the system terminal control device 1 . A temperature sensor 11 is installed in the household water tank 12, and a temperature sensor 11 is installed on the descending circulation main pipe 15 that links to each other with the household electromagnetic valve 14 and flowmeter 16.

The temperature sensor 11, the first electromagnetic valve 4, the second electromagnetic valve 7, the third electromagnetic valve 9, the fourth electromagnetic valve 10 and the circulating water pump 6 in the heat collection control system and the temperature sensor 11 in the household heat exchange control system, The flow meter 16 and household solenoid valve 14 are all electrically connected to the system terminal control device 1 . The dotted lines in Fig. 1 indicate the electrical connection cables.

The working process is shown in Figure 2:

1. Working status of heat collection and heat exchange

The solar collector group collects the solar radiation, and the system terminal control device collects the temperature T1 at the outlet end of the solar collector group through the temperature sensor, the temperature T2 on the return pipe of the circulation main pipe, the temperature T3 of the roof hot water storage tank, and The temperature T4 at the downstream circulation main pipe connected to the household solenoid valves of each floor and the temperature T5 of the household water tank. When T1-T2≥T (the temperature value of T can be set according to the actual situation), it means that the solar collector group has collected a certain amount of heat, and the system terminal control device instructs the circulating water pump to start running, and instructs the first solenoid valve and the fifth solenoid valve to open , start heating the medium water in the circulation main pipe and the buffer medium water tank. When the medium water temperature T4 in the downstream circulation main pipe and the household water tank temperature T5 reach a certain temperature difference, that is, T4-T5≥T (the temperature value of T can be set according to the actual situation), the system terminal control device instructs the household’s household water tank temperature T5 The household solenoid valve opens. When the flow meter installed in the circulation branch pipe of the bottom user detects that there is flow passing through, the system terminal control device instructs the fifth solenoid valve to close, and the effective heat is transferred to the household water tank whose household solenoid valve has been opened. heat exchange. When T4-T5<T (the temperature value of T can be set according to the actual situation), the household solenoid valve is closed. In the aforementioned circulation mode, the second solenoid valve, the third solenoid valve and the fourth solenoid valve are all in a closed state.

2. The storage working state of excess solar heat

When the solar radiation is sufficient and the heat storage of the household water tank reaches the set temperature, in order to prevent the temperature of the household water tank from continuing to rise and cause the temperature to be too high, the system terminal control device instructs the household solenoid valve to close. When the temperature of the household water tank reaches the full load state, all the household solenoid valves are closed, and the heat exchange state is forcibly cut off at this time. If the solar radiation is still relatively strong, in order to maximize the use of solar energy, the system terminal control device will switch the cycle control mode, so that the system will enter the heat storage working state. The process is: the system terminal control device issues instructions to open the second and third solenoid valves, and close the first and fourth solenoid valves. At this time, the system will not circulate the heat absorbed by the solar collector group to the down cycle supervisor, but Through the circulation process of the roof pipeline, the heat is directly transferred to the roof hot water storage tank. When the temperature T3 of the roof hot water storage tank reaches the upper limit temperature, in order to prevent the temperature of the water tank from being too high, the forced circulation pump stops running. When the solar collector group cannot obtain effective heat due to insufficient solar radiation at night or in cloudy and rainy days, the temperature T3 of the roof hot water storage tank and the temperature T5 of the household water tank must reach a certain temperature difference, that is, T3-T5≥T (The temperature value of T can be set according to the actual situation), the system terminal control device will issue an instruction to open the fourth solenoid valve and the circulating water pump, and close the first, second and third solenoid valves. At this time, the roof hot water storage tank will be used as The heat source and the household heat exchange control system carry out the heat exchange process.

Claims (5)

1. the solar heat water control system of the two water tanks circulations of a pressure-bearing type, comprise the thermal-arrest control system, the system terminal control device (1) that a plurality of minutes family heat exchange control systems that link to each other with the thermal-arrest control system and control thermal-arrest control system and branchs family heat exchange control system are moved, it is characterized in that described thermal-arrest control system comprises circulation thermal-arrest major loop and thermal-arrest branch road, described circulation thermal-arrest major loop comprises by circulation is responsible for the solar thermal collector group (3) that (2) link to each other successively, first magnetic valve (4), buffer medium water tank (5), water circulating pump (6) and second magnetic valve (7), described thermal-arrest branch road comprises roofing heat storage water tank (8) and the 3rd magnetic valve (9), the 4th magnetic valve (10), (2) import connection through the 3rd magnetic valve (9) and roofing heat storage water tank (8) is responsible in the circulation that is connected between first magnetic valve (4) and the solar thermal collector group (3), the outlet of roofing heat storage water tank (8) is communicated with the circulation person in charge (2) who is connected between buffer medium water tank (5) and the water circulating pump (6), the import of described roofing heat storage water tank (8) also by the 4th magnetic valve (10) and be connected second magnetic valve (7) and solar thermal collector group (3) between circulation be responsible for (2) and be communicated with, described circulation thermal-arrest major loop and thermal-arrest branch road are provided with some temperature sensors (11), described temperature sensor (11), first magnetic valve (4), second magnetic valve (7), the 3rd magnetic valve (9), the 4th magnetic valve (10) and water circulating pump (6) all are electrically connected with described system terminal control device (1).

2. the solar heat water control system of the two water tank circulations of a kind of pressure-bearing type according to claim 1, it is characterized in that described minute family heat exchange control system comprises household water tank (12), loop branch pipe (13) and branch family magnetic valve (14), described minute the family magnetic valve (14) be located at loop branch pipe (13) that the import of heat exchanger tube in the household water tank (12) links to each other on, this root loop branch pipe is responsible for (15) by downlink cycle again and is connected in the circulation thermal-arrest major loop on the circulation person in charge (2) between second magnetic valve (7) and water circulating pump (6), and the loop branch pipe (13) that links to each other of the outlet of the heat exchanger tube in the household water tank (12) is responsible for (15) by downlink cycle and is connected in the cycle set hot loop on the circulation person in charge (2) between second magnetic valve (7) and solar thermal collector group (3), be provided with some temperature sensors (11) in the described minute family heat exchange control system, divide the temperature sensor (11) in the family heat exchange control system, divide family magnetic valve (14) all to be electrically connected with described system terminal control device (1).

3. the solar heat water control system of the two water tank circulations of a kind of pressure-bearing type according to claim 1 and 2, it is characterized in that described solar thermal collector group (3) is provided with temperature sensor (11), be provided with temperature sensor (11) in the described roofing heat storage water tank (8), the circulation that described the 4th magnetic valve (10) links to each other with solar thermal collector group (3) is responsible for (2) and is provided with temperature sensor (11).

4. the solar heat water control system of the two water tank circulations of a kind of pressure-bearing type according to claim 2, it is characterized in that being provided with in the described household water tank (12) temperature sensor (11), the downlink cycle that links to each other with branch family magnetic valve (14) is responsible for (15) and is provided with temperature sensor (11).

5. according to the solar heat water control system of the two water tanks circulations of claim 2 or 4 described a kind of pressure-bearing types, it is characterized in that the loop branch pipe (13) that links to each other with the user's of the bottom branch family magnetic valve (14) is provided with flowmeter (16) and the 5th magnetic valve (17), described flowmeter (16), the 5th magnetic valve (17) all are electrically connected with described system terminal control device (1).

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